* {
  margin: 0;
  padding: 0;
}
*::after,
*::before {
  box-sizing: border-box;
}
a {
  text-decoration: none;
  color: #333;
}
input,
button {
  outline: none;
}
ul,
ol,
li {
  list-style: none;
}
html,
body,
#app {
  font-family: 'Helvetica Neue', Helvetica, Arial, 'Microsoft Yahei',
    'Hiragino Sans GB', 'Heiti SC';
  height: 100%;
  width: 100%;
  font-size: 12px;
}
html {
  width: 100%;
}
